JP4803722B2 - Circulating grain storage and drying system and method - Google Patents

Description

  The present invention relates to a circulating grain storage / drying system and a circulating grain storage / drying method capable of achieving a high-quality drying finish with high efficiency and energy saving.

  Cereals such as rice, wheat, and soybeans must be dried to maintain the quality after harvesting. Among these cereals, high-grade varieties and high-class products such as large-sized soybeans that are popular for boiled beans are slightly wrinkled. , Cracks, cracks, etc., greatly reduce the commercial value, and there is a need for a dry preparation means that can achieve a higher quality finish. In particular, since dry preparation is performed in the final stage of cereal production, failure to do so would waste previous steps spent on producing good quality cereals, and high quality dry preparation would result in soybeans. There is a high demand from cereal producers.

  As a general cereal dryer, there is a general-purpose far-infrared circulation dryer that can be used for drying soybeans in addition to rice and wheat. When this is used for large soybeans, Since many mechanical damages occur due to the cracked grains and the circulating conveying device, there is an advantage that automatic drying is possible and handling is easy, but it is not used for high-grade products. Therefore, for drying preparations for high-grade products, a drying device that is either left in a joint drying facility or is called a stationary dryer that blows air from the bottom with a deposition thickness of about 1 m is used. In the latter case, there is a problem that the processing amount is small and the efficiency is low, and labor is required for carrying in / out, and further, moisture is likely to be uneven.

  On the other hand, there have been various proposals for dry preparation techniques aiming at high quality. In general, the circulation type storage dryer is equipped with transport means such as an elevator for returning the grains collected in the upper storage chamber, the intermediate drying chamber, the lower grain collection chamber, and the grain collection chamber to the storage chamber, Tempering drying in a storage chamber prevents defects such as shell cracking, and has been used mainly for dry preparation of rice and wheat. The thing of the following patent document 1 is a far-infrared circulation type | formula storage-and-dryer which arrange | positioned the far-infrared radiator in the drying chamber, and it is from a far-infrared radiator above the delivery valve which sends a grain from a drying chamber to a conveyance means. It is disclosed that a shielding plate that shields far-infrared rays is provided, and quality deterioration during drying is prevented by suppressing overdrying of grains staying at the feeding valve and an increase in grain temperature.

  Moreover, as described in Patent Document 2 below, a mixed storage drying system for rice and soybeans called SDS, which mixes rice husks with cereals as a moisture absorbent, has been introduced in large-scale drying facilities. In this method, high moisture grains and dry rice husks are mixed using a mixing device, and then the mixture is put into a silo group for storing grains and stored and dried until the mixture reaches a predetermined moisture content. After being discharged from the silo for grain storage, this mixture is separated into dry grains and moisture-absorbing rice husks using a separator, and the separated dried grains are dried and prepared at high temperature using a high-temperature dryer / regulator. After that, or directly into the silo group for storing grains for storage, the separated moisture-absorbing rice husk is forcibly dried by the rice husk drying device and transferred to the mixing device again.

JP 2005-9691 A JP-A-5-10665

  In the far-infrared circulation type storage and drying machine as described in Patent Document 1, the storage room, the drying room, the cereal collection room, and the conveying means are arranged in this order from the upper side. Immediately after that, the cereals that have been exposed to mechanical shock will be subjected to mechanical impact, and in the case of large soybeans, for example, they will be subjected to mechanical impact in a state where the seed coat is stretched with hot hot air. In addition, there is a problem that damage such as cracks is likely to occur. However, if high-temperature drying is not performed in the drying chamber in order to avoid damage, the overall drying rate is remarkably slowed, resulting in a problem that efficient drying cannot be performed.

  In the case of mixed storage drying as described in Patent Document 2, damage due to the impact of the mechanical conveying means can be avoided, but since it is reduced to a predetermined moisture state by batch processing in one mixing, mixing is performed. When a certain amount of time elapses later, the moisture difference between the cereal to be dried and the moisture absorbing material becomes small, the drying speed is remarkably reduced, and a long time is required for finishing. In addition, when the initial moisture of cereals is high, it is necessary to increase the mixing ratio of the moisture absorbent and lower the moisture state of the moisture absorbent at the time of charging. As a result, there is a risk that cracks (shells), cracks (soybeans), etc. may occur.

  In order to achieve high quality drying, it is necessary to avoid rapid drying that tends to cause shell cracks and cracks, and to perform drying at a slow rate of moisture reduction. On the other hand, in order to increase the processing efficiency of drying, it is necessary to decrease to a predetermined moisture state in a short time. In order to achieve these conflicting requirements moderately, it is required to reduce the drying rate allowed for maintaining the quality to a predetermined moisture state while maintaining a certain level of the drying speed. According to the above, since the drying rate immediately after mixing is high and the drying rate is remarkably lowered with the passage of time, the above-described requirements cannot be satisfied.

  In addition, in order to maintain high quality, it is necessary to control the drying speed to an appropriate level depending on the type of cereal, but there is a problem that it is impossible to control the drying speed as necessary in the batch storage mixing drying described above. is there.

  The present invention has been proposed in order to cope with such circumstances, avoiding quality deterioration due to exposure of cereals to be dried to high temperatures, being able to achieve high-quality drying with high efficiency, and types of cereals. The purpose is to be able to control the proper drying speed according to the above.

  In order to achieve such an object, the present invention has the following features.

First, as a circulation type grain storage / drying system, a mixture storage tank in which the moisture absorbent absorbs moisture of the grain to be dried by mixing and storing the grains to be dried and the moisture absorbent , and the inside of the mixture storage tank the mixture was separated into a carry-out to be dried cereals and moisture absorbing material that has absorbed moisture, and separating the feedback means for feeding back a drying target cereal separated into the mixing reservoir tank, separating water absorbing material by the separating feedback means A circulation drying means for drying together with the water absorption material formed, and a water absorption material feedback means for returning the dried water absorption material taken out from the circulation path of the circulation drying means to the mixed storage tank. In parallel with the storage by the mixed storage tank, the dried cereals separated by the separation feedback means and the dried moisture absorbent by the moisture absorbent feedback means Returning is performed synchronously, the cereal to be dried and the moisture absorbing material in the mixed storage tank are circulated, and by this circulation, the moisture absorbing material that has absorbed moisture in the mixed storage tank is converted into a dried moisture absorbing material. substituted by the newly mixed, drying speed of the drying object cereals in the mixing reservoir tank is to Rukoto characterized held constant.

Further, the circulating cereal storage drying system described above, characterized in that it comprises a feedback amount adjusting means for adjusting the feedback amount of moisture absorbent to take out the water absorbent feedback means.

  Furthermore, in the above-described circulation type grain storage / drying system, the control unit includes a control unit that controls the feedback amount adjusting unit, and the control unit controls the feedback amount according to the drying state of the target grain to be dried in the mixed storage tank. It is characterized by controlling.

  In addition, in the circulating grain storage and drying system described above, the control unit controls the amount of feedback according to the moisture state of the moisture absorbing material to be returned.

Further, in the above-described circulation type grain storage and drying system, the circulation type drying means is capable of high temperature drying with hot air or far infrared rays.

  Furthermore, in the above-described circulation type grain storage and drying system, the separation feedback means includes a separator that separates the mixture into a grain to be dried and a moisture absorbent, and a separator that carries the mixture carried out from the mixing and storage tank. It is provided with the conveyance supply means to supply to.

  Moreover, in the circulating grain storage and drying system described above, the cereal to be dried is soybean, the moisture absorbent is wheat or straw, and the separation feedback means has a difference in particle size so that the separation target is the object to be dried. It is provided with the separator which isolate | separates cereals and the said water | moisture-content absorber.

In the above-mentioned circulation type grain storage and drying system, the operation of the separation feedback unit, the operation of the circulation type drying unit , and the extraction to the moisture absorbent return unit are automatically performed.

Then, as the circulating cereals reservoir drying method, mixing reservoir drying said water absorbing material by storing a mixture of a drying object cereals and moisture absorbing material in the mixing reservoir tank absorbs moisture of the drying object cereals A separation feedback step of unloading the mixture in the mixed storage tank and separating it into a dry target cereal and a moisture absorbent that has absorbed moisture, and returning the separated cereal to the mixed storage tank; and moisture absorbing material drying step of drying the absorbent material together with the separation feedback step in segregated moisture absorbent, the moisture absorbing material was dried taken out from the circulation path of the water absorbing material drying step to the mixing reservoir tank possess a moisture absorbing material feedback step for feeding back, the said mixture in parallel with the reservoir drying step, the separating feedback step and said water absorbing material feedback step is performed synchronously, dried pair of the mixing reservoir tank In the mixed storage and drying step, the cereal and the water absorption material are circulated, and by this circulation, the water absorption material that has absorbed the water in the mixed storage tank is replaced with a dry water absorption material and newly mixed. drying rate of the drying object cereal characterized Rukoto held constant.

  In addition, in the circulating grain storage and drying method described above, in the moisture absorbent return process, the amount of feedback returned to the mixed storage tank is controlled.

  Furthermore, in the above-described circulating-type grain storage and drying method, the control of the return amount is performed by the mixed storage and drying process according to the drying state of the target grains to be dried in the mixed storage and drying process and the moisture state of the returned moisture absorbent. The drying speed is controlled so as to be within a setting allowable range for quality maintenance.

  In the above-described circulation type grain storage and drying method, the separation feedback step, the moisture absorbent drying step, and the moisture absorbent return step are automatically performed.

  According to the present invention having such characteristics, the following effects can be obtained.

  For one thing, after separating the mixture of the cereal to be dried and the moisture absorbent material mixed and stored in the mixed storage tank, and re-drying the separated moisture absorbent material by circulation drying, it is separated from the re-dried moisture absorbent material. The cycle of mixing and storing the returned drying target cereal again can be repeated a plurality of times to perform circulation type mixed storage and drying. As a result, it is possible to adjust the temperature of the moisture absorbing material in one mixed storage drying and the moisture transferred from the cereal to be dried to the moisture absorbing material within an allowable range in which quality can be maintained, and to re-dry moisture absorption By returning an appropriate amount of material to the mixed storage tank, it is possible to suppress a decrease in the drying rate with time in the mixed storage drying.

  Compared with the conventional batch processing of mixed storage and drying, the drying rate drops significantly after about 4 hours from mixing, but the separated and re-dried moisture absorbent material is newly added within the safe drying rate range of cereals. By returning to the mixing storage tank while automatically controlling an appropriate amount, the moisture of the cereal to be dried can be quickly reduced to the finishing moisture while controlling or keeping the drying speed at the time of mixing storage drying.

  During mixed storage drying in the mixed storage tank, moisture absorption material separated from the mixture in the mixed storage tank can be dried at high temperature with high efficiency by parallel processing using a circulating dryer, so there is little moisture absorption. The water absorption material can be efficiently dried with the stock of the material, and the fuel consumption can be greatly reduced by the high heat efficiency drying at high temperature.

  The mixed storage tank may be a simple equipment that mixes the cereal to be dried and the moisture absorbent, stores it for a certain period of time, and then removes the mixture, and does not use thermal power in the mixed storage tank, so the cereal to be dried is exposed to high temperatures. It is safe without any quality degradation due to being done. In particular, even for large soybeans, it is possible to efficiently and efficiently prepare a high-quality dry preparation without causing cracking or damage.

  When the cereal to be dried is soybean, the mixed storage tank can perform mixed storage drying at almost the same drying speed over the entire layer at room temperature, and the drying per grain is slow, but overall Can be quickly dried. In addition, since the drying rate per grain can be kept low at normal temperature, there is no quality deterioration due to exposure to high temperatures, and there is no transport after high temperature processing, so there is no mechanical damage during transport. . Moreover, the water-absorbing material to be mixed can be used as waste from sprouted wheat, and is safe to mix, and can be easily separated from soybeans by the difference in particle size.

  In addition, the circulation type mixed storage and drying system having the above-described features is configured by a simple device in which a mixed storage tank with a conveyance device, a conventional circulation type dryer, a separation feedback means, and a moisture absorbing material feedback means are connected by a conveyance path. This can reduce the cost of equipment installation.

  Further, the operation of the separation feedback means, the operation of the circulation dryer, and the removal to the moisture absorbent return path are automated, and the separation feedback step, the moisture absorbent drying step, and the moisture absorption are performed. By performing the material return process automatically, the entire system can be automated.

  The present invention having the features as described above can avoid quality deterioration due to exposure of the cereal to be dried to high temperatures, and can achieve high-quality drying with high efficiency. In addition, it is possible to control an appropriate drying rate according to the type of cereal.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Drawing 1 is an explanatory view showing the basic composition of the circulation type grain storage drying system concerning the embodiment of the present invention. The circulating grain storage / drying system 1 includes a mixed storage tank 10, a separation feedback means 11, a circulation dryer 12, and a moisture absorbent return path 13.

  The mixed storage tank 10 mixes, stores, and dries the drying target cereal by mixing and storing the drying target cereal that has been carried in or returned and the moisture absorbent material that has been transferred in or returned. The mixing storage tank 10 is equipped with a mixing unit 10A that mixes the dried cereal to be dried and the moisture absorbing material. By mixing the moisture absorbing material and the cereal to be dried, the moisture absorbing material becomes a cushioning material and an effect of reducing damage is obtained.

  The separation feedback means 11 carries out the mixture in the mixed storage tank 10 and separates it into the drying target cereal and the moisture absorbing material, and returns the separated drying target cereal to the mixed storage tank 10. Separator 11A which separates into cereals and a water absorption material, and conveyance supply means 11B which supplies the mixture conveyed from the mixed storage tank to separator 11A are provided. When the cereal to be dried is soybean and the moisture absorbing material is wheat (such as ear sprouted wheat) or straw, the separator 11A can be separated according to the difference in particle size.

  The circulation dryer 12 circulates and drys the moisture absorbing material together with the moisture absorbing material separated by the separation feedback means 11, and is generally capable of high temperature drying with hot air or far infrared rays used in rice wheat and the like. Things can be adopted.

  The moisture absorbing material return path 13 is a conveyance path for returning the moisture absorbing material partially taken out from the circulating path 12B carried out from the tank 12A of the circulation dryer 12 and circulated into the mixed storage tank 10, The conveyance path from the discharge side of the feedback amount adjusting means 13A for adjusting the return amount of the absorbent to the mixing unit 10A in the mixed storage tank 10 is connected.

  The return amount adjusting means 13A adjusts the return amount of the water absorbing material to the mixed storage tank 10 manually or automatically by a timer or the like, and is configured by a shutter member or the like that operates manually or automatically.

  Moreover, when automatically controlling the drying speed of the cereal to be dried in the mixed storage tank 10, the controller 20 (control means) for controlling the feedback amount adjusting means 13A is provided. The controller 20 is, for example, the mixed storage tank 10 The feedback amount adjusting means 13A is controlled in accordance with the detection result of both or one of the drying state sensor 21 provided in the return path and the moisture state sensor 22 provided in the return path 12B, and the grains to be dried in the mixed storage tank The feedback amount by the feedback amount adjusting means 13A is controlled in accordance with the drying state of the water absorbent or the moisture state of the moisture absorbing material to be returned.

  By automating the operation of the separation feedback means 11, the operation of the circulation dryer 12, and the removal to the moisture absorbent return path 13, the operation of the entire circulation type grain storage and drying system 1 can be automated.

  FIG. 2 is a process flow illustrating a drying method using the above-described circulating grain storage drying system.

  First, in a carrying-in process (S10), drying object cereals, such as soybean, and moisture absorption materials, such as wheat adjusted to the predetermined moisture state, are carried in into the mixing storage tank 10. FIG. It is preferable that the moisture state of the moisture absorbing material at this time is prepared so that moisture is not excessively transferred from the grains to be dried.

  In the mixed storage drying step (S11), the mixture of the drying target cereal and the moisture absorbing material is stored in the mixed storage tank 10 for a predetermined time (4 to 5 hours). In the meantime, the moisture of the cereal to be dried is absorbed by the moisture absorbing material, and gentle mixed storage drying is performed.

  When a predetermined time elapses, the conveyance supply means 11B of the separation feedback means 11 is activated by an automatic operation of a timer or the like, and the mixture in the mixed storage tank 10 is unloaded and supplied to the separator 11A. In the separator 11B, the moisture absorbing material (humidity) that has absorbed moisture is separated from the drying target cereal to some extent, and the moisture absorbing material is conveyed into the tank 12A of the circulation dryer 12, and the drying target cereal is mixed and stored. Returning to the tank 10 (separation feedback step (S12)).

  On the other hand, in parallel with the aforementioned mixed storage drying process (S11), in the carry-in process (S20), a predetermined amount of moisture absorbing material is carried into the tank 12A of the circulation dryer 12, and the operation of the circulation dryer 12 is performed. Parallel processing of the moisture absorbent drying process (S21) is performed. At this time, the moisture-absorbing material separated in the separation feedback step (S12) described above is put into the circulation dryer 12, and a circulation drying process at a high temperature is performed.

  In the moisture absorbing material returning step (S22), the dried moisture absorbing material is partially taken out from the circulation path of the circulation dryer 12, and the moisture absorbing material is placed in the mixed storage tank 10 with the set feedback amount. It returns and remixes the drying object cereal separated and returned in the separation feedback step described above and the returned moisture absorbent.

  As a result, in the mixed storage tank 10, mixed storage and drying is performed by the cereal to be dried and the moisture absorbent material in a low moisture state, and the mixed storage and drying can be continued without reducing the drying speed. And by repeating the circulation cycle which synchronizes the separation feedback step (S12) and the moisture absorbent return step (S22) described above a plurality of times, the moisture of the cereal to be dried is predetermined finish in the mixed storage drying step (S11). When this is achieved, the return path of the separation feedback means 11 is switched to carry out the finished cereal (finishing / unloading step (S30)).

  According to such a circulation type grain storage and drying system and drying method according to the embodiment of the present invention, before the drying speed at the time of mixed storage and drying is significantly reduced, the separation feedback step (S12) and the moisture absorbent return step (S22). ) To replace the moisture absorbing material that has absorbed moisture with a moisture absorbing material having a low moisture state and mix, so that it is possible to perform highly efficient mixed storage drying while suppressing a decrease in the drying rate. .

  Further, by controlling the feedback amount of the dried moisture absorbent returned in the moisture absorbent return process (S22), the drying speed during storage and drying can be suppressed within a safe quality maintenance allowable range. High-quality drying can be realized by proper drying.

  Furthermore, since the moisture absorbing material can be dried at a high temperature by warm air or far infrared rays, the fuel consumption can be greatly reduced by the high temperature drying with high thermal efficiency.

  Next, an example of automatic control by the controller 20 will be described. The controller 20 can be configured by a microcomputer chip or the like provided with a timer. Detection signals from the drying state sensor 21 and the moisture state sensor 22 are input to the controller 20, and initial moisture and weight of the drying target cereal, moisture at the time of returning the moisture absorbing material, setting conditions for the drying speed, and the like are input. It will be. Further, the control signal from the controller 20 controls the operation of the separation feedback means 11 and the feedback amount of the moisture absorbing material by the feedback amount adjusting means 13A. That is, the circulation time or frequency of the separation feedback means 11 and the mixing ratio of the water absorbing material are obtained by calculation based on the input factors described above, and the operation of the separation feedback means 11 and the moisture absorbing material by the feedback amount adjusting means 13A are accordingly calculated. The amount of feedback is controlled.

  FIG. 3 shows a system configuration in the case where soybean is used as a drying target cereal and wheat (ear germinated wheat) is used as a moisture absorbent as an embodiment of the present invention. The following examples are only examples of the present invention, and the present invention is not particularly limited thereto.

  In the mixed storage tank 10 into which the mixture of soybeans and wheat is carried, a cereal collection chamber 102 is provided below the storage chamber 101, and conveying means 103 such as a screw conveyor is provided at the bottom of the cereal collection chamber 102. The mixture conveyed by the conveyance means 103 is carried out to the bucket conveyor 110 which comprises the conveyance supply means 11B. The bucket conveyor 110 lifts the transported mixture and supplies it to the grain sorter 111 (separator 11 </ b> A) provided above the mixed storage tank 10. In the grain sorter 111, the supplied mixture is separated according to the particle size, soy beans with a large particle size are dropped into the mixing unit 10A in the mixing storage tank 10 immediately below, and a circulation dryer equipped with wheat with a small particle size. It transports into 12 tanks 12A. The grain sorter 111 and the tank 12A are connected by a transport hose 112, and the wheat separated via the transport hose 112 is transported into the tank 12A of the circulation dryer 12. The equipment consisting of the mixed storage tank 10, bucket conveyor 110, grain sorter 111, and transport hose 112 utilizes the existing circulation drying with the heat source stopped, and adds the grain sorter 111 and transport source 112 to the circulation path. Can be configured.

  Further, as the circulation dryer 12 for drying wheat, an existing hot air or far-infrared circulation dryer can be applied. Here, an example of a hot air type is shown, and what has passed through the hot air drying chamber 122 below the storage chamber 121 in the tank 12 </ b> A is collected in the cereal collection chamber 123 below and provided at the bottom of the cereal collection chamber 123. The wheat conveyed by the conveying means 124 such as a screw conveyor is carried out to the bucket conveyor 125 that forms a circulation path. The hot air drying chamber 122 is formed so as to pass through a hot air passage extending from the hot air portion 122A to the exhaust air portion 122B, and the wheat exposed to the hot air is dried at a high temperature.

  A transport hose 130 is connected to the circulation path of the circulation dryer 12 to form a moisture absorbent return path 13. The transport hose 130 forms a transport path (return path) from the discharge port of the bucket conveyor 125 to the mixing unit 10 </ b> A of the mixed storage tank 10. The transport hose 130 and the circulation path 126 of the circulation dryer 12. The electric shutter 132 which comprises the feedback amount adjustment means 13A is equipped in the branch part 131. Again, the equipment comprising the circulation dryer 12, the transport hose 130, and the electric shutter 132 can be configured by adding the transport hose 130 and the electric shutter 132 to the circulation path of the existing circulation dryer 12.

  In this embodiment, the operation of the electric shutter 132 and the operation of the packet conveyor 110 are controlled by the controller 20 described above, whereby the drying speed in the mixed storage tank 10 can be controlled.

  According to such an embodiment, a circulation type cereal storage and drying system can be easily constructed by using the existing circulation type dryer and equipping the transport hoses 112 and 130, the grain sorter 111, and the electric shutter 132. This makes it possible to achieve high-quality and high-efficiency drying of grains with inexpensive capital investment. In particular, the dry preparation of soybeans avoids mechanical damage during transportation because no drying treatment is performed at a high temperature, and also reduces wrinkles and cracks by keeping the drying speed of each grain low. While preventing quality deterioration, the overall average drying speed can be increased to about 2% / h, and highly efficient drying processing can be performed.

  Further, since no thermal power is used in the mixed storage tank 10, complicated thermal power preparation for quality maintenance is not necessary, and there is no worry of trouble due to thermal power. Furthermore, the water-absorbing material to be mixed can be used as waste such as ear germinated wheat and is safe to mix, and can be separated from soybean easily and reliably by the difference in particle size.

  The soybean drying method according to this embodiment will be described. When the soybean to be dried is carried into the mixed storage tank 10, the initial moisture of the soybean is measured with a moisture meter. On the other hand, the wheat serving as the moisture absorbent is carried into the tank 12 of the circulation dryer 12 and dried to a predetermined moisture state in advance. At this time, the electric shutter 132 is opened to open the circulation path of the circulation dryer 12 so that the operation of the circulation dryer 12 can be performed independently.

  The mixing ratio of wheat to be mixed is determined according to the measured moisture state of soybean, the electric shutter 132 is closed, and the wheat dried to a predetermined moisture state via the transport hose 130 is mixed in the mixing storage tank 10. At the same time, the soybean to be dried is carried into the mixing unit 10A, and the mixture of soybean and wheat is carried into the mixed storage tank 10 at a set mixing ratio. When the carry-in is completed, the electric shutter 132 is opened again, and the circulation dryer 12 is operated alone or stopped.

  In the mixed storage tank 10, the mixed storage and drying of soybean is performed by the natural water movement of the mixture. Thereafter, the controller 20 (refer to FIG. 1; not shown in FIG. 3), after a fixed time of 4 to 5 hours has passed, the mixture in the mixed storage tank 10 is carried out by the conveying means 103 and the bucket conveyor 110 and mixed. The mixture is separated by being guided to a grain sorter 111 at the upper part of the storage tank 10. At this time, impurities and crushed grains are selected and removed.

  The soybeans separated by the grain sorter 111 are returned to the mixing unit 10A of the mixing storage tank 10, and the separated wheat is returned to the tank 12A of the circulation dryer 12, but at the same time, the electric shutter 132 is closed. Then, the dried wheat in the lower layer of the tank 12 </ b> A of the circulation dryer 12 is conveyed by the bucket conveyor 125 and returned to the mixing unit 10 </ b> A via the conveyance hose 130. The feedback amount of wheat at this time is controlled by the open / closed state of the electric shutter 132, and the mixing ratio is set so as to obtain a desired drying rate according to the moisture state of wheat and the dried state of soybean. At this time, the dried state of soybean is continuously measured by a moisture meter provided in the mixed storage tank 10, and the moisture state of wheat is measured at any time by a moisture meter provided in a circulation path such as a discharge port of the bucket conveyor 125.

  The wheat in a high moisture state separated by the grain sorter 111 is dried to a predetermined moisture state (for example, 12% w.b.) by the circulation dryer 12, and prepared for the next mixing. At this time, the drying of the wheat is performed in parallel processing with the mixed storage drying in the mixed storage tank 10.

  The above cycle is repeated a plurality of times, and when the moisture of the soybean is in a finished state, the soybean separated by the grain sorter 111 is discharged and collected in a predetermined carry-out container (such as a flexible container bag).

  According to such an embodiment, even high-grade large-sized soybeans can be dried efficiently and without generating wrinkles, cracks or cracks.

It is explanatory drawing which shows the whole structure of the circulation type grain storage drying system which concerns on embodiment of this invention. It is explanatory drawing explaining the circulation type grain storage drying method which concerns on embodiment of this invention. It is explanatory drawing explaining the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Circulation type grain storage drying system 10 Mixing storage tank 10A Mixing part 11 Separation feedback means 11A Separator 11B Conveying supply means 12 Circulation dryer 12A Tank 12B Circulation path 13 Moisture absorbent return path 13A Feedback amount adjustment means 20 Controller 21 Drying State sensor 22 Moisture state sensor 101, 121 Storage chamber 102, 123 Grain collection chamber 103, 124 Conveyance means 110, 125 Bucket conveyor 111 Grain sorter 112, 130 Conveyance hose 122 Hot air drying chamber 126 Circulation path 131 Branching section 132 Electric shutter

Claims (12)

A mixed storage tank in which the moisture absorbing material absorbs moisture of the drying target cereal by mixing and storing the drying target cereal and the moisture absorbing material,
Separation feedback means for carrying out the mixture in the mixed storage tank and separating the dried target cereal and the moisture absorbing material that has absorbed moisture, and returning the separated dried target cereal to the mixed storage tank;
Circulating drying means for drying the moisture absorbent together with the moisture absorbent separated by the separation feedback means,
Moisture absorbing material feedback means for returning the dried moisture absorbing material taken out from the circulation path of the circulation type drying means into the mixed storage tank;
Equipped with a,
In parallel with the storage by the mixed storage tank, the return of the dried cereals separated by the separation feedback means and the return of the dried moisture absorbent by the moisture absorbent return means are performed synchronously, and the mixing Cereals to be dried and moisture absorbing material in the storage tank circulate,
By this circulation, the moisture absorbing material that has absorbed the moisture in the mixed storage tank is replaced with a dried moisture absorbing material and newly mixed, so that the drying speed of the grains to be dried in the mixed storage tank becomes constant. circulating cereals reservoir drying system according to Rukoto characterized retained. The circulation type grain storage and drying system according to claim 1, further comprising a feedback amount adjusting means for adjusting a return amount of the moisture absorbing material taken out by the moisture absorbing material returning means .   3. The circulation according to claim 2, further comprising a control unit that controls the feedback amount adjusting unit, wherein the control unit controls the feedback amount according to a drying state of the cereal to be dried in the mixed storage tank. Cereal storage and drying system.   The circulating grain storage / drying system according to claim 3, wherein the control means controls the feedback amount in accordance with a moisture state of the moisture absorbing material to be returned. The circulation type grain storage and drying system according to any one of claims 1 to 4, wherein the circulation type drying means is capable of high temperature drying by hot air or far infrared rays.   The separation feedback means includes a separator that separates the mixture into a cereal to be dried and a moisture absorbing material, and a conveyance supply unit that supplies the mixture carried out from the mixed storage tank to the separator. The circulating grain storage drying system according to any one of claims 1 to 5.   The drying target cereal is soybean, the moisture absorbing material is wheat or straw, and the separation feedback means includes a separator that separates the drying target cereal from the moisture absorbing material according to a difference in particle size. The circulating cereal storage and drying system according to any one of claims 1 to 6. The circulation type grain storage according to any one of claims 1 to 7, wherein the separation feedback means, the circulation drying means , and the moisture absorbent return means are automatically taken out. Drying system. A mixed storage drying process in which the moisture absorbing material absorbs moisture of the drying target cereal by mixing and storing the drying target cereal and the moisture absorbing material in a mixed storage tank;
A separation feedback step of unloading the mixture in the mixed storage tank and separating it into cereals to be dried and a moisture absorbent that has absorbed moisture, and returning the separated cereals to be dried into the mixed storage tank;
A moisture absorbing material drying step for drying the moisture absorbing material together with the moisture absorbing material separated in the separation feedback step;
A moisture absorbent return process for returning the dried moisture absorbent taken out from the circulation path of the moisture absorbent drying process into the mixed storage tank;
I have a,
In parallel with the mixed storage drying process, the separation feedback process and the moisture absorbent return process are performed in synchronization, and the drying target cereal and the moisture absorbent in the mixed storage tank circulate,
By this circulation, the moisture absorbing material that has absorbed moisture in the mixed storage tank is replaced with a dried moisture absorbing material and newly mixed, so that the drying rate of the grains to be dried in the mixed storage drying step is constant. circulating cereals reservoir drying wherein the Rukoto retained. The circulating grain storage / drying method according to claim 9 , wherein a feedback amount returned to the mixed storage tank is controlled in the moisture absorbent return process. The control of the return amount is based on the drying condition of the cereal to be dried in the mixed storage drying process and the moisture state of the moisture absorbing material to be returned, so that the drying speed in the mixed storage drying process is within the set allowable range of quality maintenance circulating cereals reservoir drying method according to claim 1 0, characterized in that it is controlled to be. The circulating grain storage and drying method according to any one of claims 9 to 11, wherein the separation feedback step, the moisture absorbent drying step, and the moisture absorber return step are automatically performed.

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